Overload clutch device.



O. A. SMITH.

OVERLOAD CLUTCH DEVICE.

APPLICATION FILED NOV. 22, 1909.

Patented Dec. 20, 1910.

2 SHEETS-SHEET 1 EQ'ZIEQSSQ 0. A. SMITH. OVERLOAD GLUTCH DEVICE.

APPLIOATION FILED NOV. 22, 1909.

- Patented Dec. 20,1910.

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[Lam/ GSCAEZ A. SMITH, OE CLEVELAND, OHIO,

hbSIGNOTiE TO TIiE NATIONAL-ACME MANU- UVEBLOAD CLUT H irnvroii.

Specification ofLettersPatentl p t t Deg 29, 3pm,,

Application filed Novemher .22, 1909. .Serial No. 529,215.

To all "whom it may concern:

Be ltknOWll that I, OSCAR A. SMITH, a citizen of the Unitet States, residing in Cleveland. in the county of Cnyahoga and This invention relates to clutch devices that will release upon an alnmrnial strain or load being placed on a machine to'rlisconnect the driving neniher from itsdriven member, thereby preventing breakage of the machine.

The object oil the invention is to provide ainiinproi'ed form of such device that will automatically trip upon an overload being exerted and the, parts will be thrown out of operative position.

In the aeconipanyin drawing showing an embodimentoll" my invention Figure 1 is an axial section through a shaft with the device applied. Fig. is a similar View with the parts in another position. l ig'. isa similar View with the parts in still another position. Fig. 4: shows in elevation the locking plate. Fig. a section on the line --5 indicated in Fig. l. Fig. (3 is an elevation of the locking plate shown in Fig. 5. Fig. 7 is another section on the line 7--7 of Fig. l. Fig. 8 is a section on the line 8 8 of Fig. 9, and Fig. l) is an elevation o'l ,the clutch plate. 1

and Fig. 11 in elevation the tripping head.

Fig. shows in section On the shaft t suitahi secured a sleeve 2, on which freely rotates the driving ineniher shown comprising a pulley 2- in the pulley a number of passages extending; longitudinally, two of them 4t and 5 being shown in which slide pins (3 and 'T.- A clutch member 8 is loose on the sleeve adjacent the pullevll and is providezl-with the sockets l) and 10 arranged to register with and receive the pins ii and T when advanced. A pinion ll is sl'iown secured to the clutch plate 8, that h a suitable gear 27 and pinion 28, not; shown. drive'a gear 12, which latter is secnred to the head 13 fast on shaft 1. the shaft 1 on the opposite side of the pulley and normally has its hub '15 pressed against the pulley by a. coil spring ll wlnvse outer end engages a head 17, the latter is shown as locked on, the shall; by a set screw 18 whereby it can be. quickly released when A loclrplate 14 is slidahle on pin 26 to arrest the lock plate.

desired to reset the lock plate and pins after release of the driving pulley. The lock plate 14 has its face lQ' adjaCent the ends of the pins 6 and 7, provided with a pair of lugs 20 and 21 in position to engage respectively with'the adjacent ends of the pins 8 and 7 andretain these pins with their extremities projecting into the sockets 9 and 1G in the elntclrplate 8 Preferably shallow depressions 2 and 93 are provided in the face or" the lugs for engagement with the similarly rounded ends of the pins to prevent the easydisplacement. of the pins on the lugs. The opposite face of the lock plate 14: is provided with one or more lugs 25, and the head 17 is provided with a lug 28. These lugs are normally not in position of engagement as indicated inFig. 'l. The head rotating with the shaft will. turn-at a differentspeed. froin the lock plate that rotates with the pulley 3. and hence a rearward movement o'l the lock plate would cause engagement of these two logs and result in the head shifting the lock plate rotativel v relative to the pulle 3. v

in the operation of the device. the parts are normally as indicated in Fig". 1 with the lock plate retaining; the pins with their end portions projecting into the sockets in the clutch plate to cause the clutch plate to be driven hvthe pulley. Preferably the eugagl'llfjj faces at the pins or the elntrh plate sorket walls, are made somewhat slopino'. s shown the pins have their engaging porlions slightly conical. Upon overload for any reason on shaft 1, the inclined portions of the pins will cause them to be shifted rearward out of the socketsin the clutch plate whereby the clutch plate is tree from the driving pulley. The rearward movement oi these pins will force the'loek plate let axially toward the head and will cause the pins-27 and 2G to he broughtinto engageine t (Fig. 2). If the clutch plate is dis- 10d engaged and ceases to rotate, the shaft will, he ::l'l'0:-t(i(l and also the head with the pin iii. the pulley will have its pin 25 strike the The continned advance of the pins by the rotation of the pulley will shift. them beyond the retaininr lugs 2() and 21. The. rearward movement at the lock plate by the pins causes a further compression oi the co l spring 16,

and the lugs now being free from the pins lint the lock plate still rotating with ice pins into the'sockets in the clutch plate because the hub of the lock plate will'engagc the pulley. After the machine has been re paired or fixed and the pulley stopped, the head 17 is released by its set screw 18 and withdrawn a short distance. The pulley is turned relative to the clutch plate until the pmscan enter the socket therein. which are forced into the sockets by the engagement of the lugs on the lock plate, and then the head is returned to its former position and locked.

Having thus described my invention, I claim:

1. The combination of a shaft, a driving member loose on the shaft and having longitudinal passages, a pin slidable in each of the passages of the member, a clutch mem ber connected with the shaft and having socket: portions to receive the pins when advanced in the said passages in the driving member, and cause the driving mcmber'to drive the clutch member, resilient means for normally holding the pins in said driving position whereby the pins can recedc into the clutch member upon overload and release the clutch member, and means for disengaging the pins from said resilient means upon disengagement of the clutch member from 5 the driving member and the relative advance rotatively of one of such members.

2. The combination of a shaft. a driving member loose on the shaft and having longitudmal passages. a pin shdable in each of drive the clutch member. resilient means for normally holding the pins in said driving position whereby the pins can rcccde into the clutch member upon overload and release the clutch membehmeans for disengaging the pins from said resilient: means upon disenmw'cmcnt of thc clutch member with the driving member and the relative advance rotativclv of one of such members, the clutch member and pins being constructed with our of their engaging faces inclined to the direc tion of motion to facilitate recession of the pins for disengagement with the clutch.

3. The combination of a shaft, a driving member loose on the shaft. and having longitudinal passages, a pin slidable in each of the passages, a clutch member having socket portions arranged to receive the pins when ad 'anced and cause the driving member to actuate the clutch member, a resilient member slidable to engage the ends of the pins and advance them in the driving member to engage the clutch member-in the normal position of the resilient member, and means for shifting the resilient, member upon disengagement of the clutch member by the pins whereby the resilient member will be out of engaging position to advance the pins.

l. The combination of a sha t, a driving member loose on thesha'tt and having longitudinal passages, a pin slidableincach of the passages, a clutch member ha 'n'g" socket portions arranged to'receive tl )ins when advanced and cause the driving member to actuate the clutch member, a'resilint'menr' her slidable to engage the ends of the pins and advance them in the drlvimr memberftom engage the clutch member in the normal position of the resilient member, means for shifting the resilient member upon"disen-' gagemcnt of the clutch member by the pins whereby the resilient member will be out of engaging position to advance the pins, the clutch member and pins being constructed with one of their engaging faces inclined to the directiongot motion to facilitate recession of the pins for disengagement with the clutch.

5. The combination of a shaft, :1 driving pulle loose on the shaft and having a mum ber of longitudinal passages. a pin slidable in each of said passages of the pulley, a clutch member connected with the .haft to drive it and having socket portions ar angcd lcy passages and cause the pulley to drive i I the clutch member. a lock plate slidable on the shaft in position to engage the ends ofthe pins not engaged by the clutch member, 'ltc lock plate having lugs on its face in posh lion to engage the said pins, a spring cngag ing the lock plate causing it to press the pins when engaged by the lugs into the sockets in the clutch member, connecting means causing the shaft to be driven fronrthe clutch plate. a 1 ad fast on the shaft and arranged to engage the lock plate when advanced by the pins against the pressure of the spring to cause the lock plate to shift a. more the lugs away from engagement wi h the sins thereb permitting the lock plate to be \anced by the spring Without forcing the pins into the sockets in the clutch plate.

(3. The combimition of a shaft, a driving pulley loose on the. shaft and having a nmnher of longitudinal passages, a pin slidable in each of said passages of the pulley, a clutch member connected with the shaft to drive it and having socket portions arranged to receive the pins when advanced in the pulley passages and cause the pulley to drive the pins not engaged by the clutch plate, the

i look plate having lugs on its face in position to engage the said pins a spring engaging to engage the ends of the pins not engaged the lock plate causing 1t to press the pins when engaged by the lugs into the sockets in the clutch plate, connecting means causing the shaft to be driven'from the clutch 3 plate, a head fast on the shaft and arranged to engage the lock plate when advanced by the pins against the pressure of the spring to cause the lock plate to shift and move the lugs away from engagement with the pins thereby permitting the lock plate to be adby the clutch plate, the lock plate having lugs on its face in position to engage the pins, a spring on the shaft engaging the l ock' 'plate causing it to press the pins when engaged by the lugs into the sockets in the clutch plate, coni'iecting means caus ing the shaft to be driven from the clutch plate, a head fast on the shaft and arranged to engage the lock plate when advanced by vanced by the spring without forcing the 1 pins into the sockets in the clutch plate, the head being shiftable to reset the lock plate.

fast on the shaft, a driving pulley loose on the sleeve and having longitudinal passages, a pin slidable in each of the passages, a clutch member connected with the sleeve to drive it and having socket portions arranged to receive the pins when advanced'in the pulley passages, and cause the pulley to drive the clutch member, a lock plate slidable on the shaft in position to engage the ends of the pins not engaged by the clutch plate, the lock plate having lugs on its face in position to engage the said pins, a spring on the shaft engaging the lock plate causing it to'press the pins when engaged by the lugs into the sockets in the clutch plate, connecting means causing the shaft to be driven from the clutch plate, a head fast on the shaft and arranged to engage the lock plate when advanced by the pins against the pressure of the spring to cause the lock plate to shift and move the lugs away from engagement with the pins thereby permitting the lock plate to be advanced by the spring without advancing the pins into the sockets in the clutch plate.

S. The combination of a shaft, a driving pulley loose on the shaft and having longitudinal passages, a pin slidable in each of the passages, a clutch member connected with the sleeve to drive itand having socket portions arranged to receive the pins when advanced in the pulley passages and cause the pulley to drive theclutch member. a lock plate slidable on the shaft in position the pins against the pressure of the spring to cause the lock plate to shift and move the lugs away from engagement with the pins thereby permitting the lock plate to be ad- 7. The combination of a shaft. a sleeve vanced by the spring without advancing the pins into the sockets in the clutch plate.

S). The combination of a Shaft, a driving pulley loose on the shaft and having a number of longitudinal passages, a pin slidable in each of said passages, a clutch member connected with the shaft to drive it and having a number of socket portions arranged to receive the pins when advanced in the pulley passages and cause the pulley to drive the clutch member, a lock plate slidable on the shaft in position to engage the ends of the pins not engaged by the clutch plate, the lock plate having lugs 011 its face in position to engage the said pins, a spring on the shaft engaging the lock plate causing it to press the pins when engaged by the lugs. into the sockets in the clutch plate, connecting means causing the shaft to be driven from the clutch plate, a head fast on theshaft, alpin on the head, a pin on the lock plate arranged to engage the pin on the locking plate when advanced by the said clutch pins against the pressure of the spring, causing the locking plate to shift and move the lugs away from engagement with the pins thereby permitting the lock plate to be advanced by the spring Without forcing the clutch pins into the sockets in the clutch plate.

OSCAR A. SMITH.

Vitnesses A. N. HENN, PAUL E. RYAN. 

